Also known as:
- Week-end de terreur
- A Noite das Brincadeiras Mortais
- Aprildagen
- Aprillipäivä
- Die Horror-Party
- Eglima tin protaprilia
- Inocentada sangrienta
- Pesce d'Aprile
- Prima Aprilis
- Fred Walton
- Danilo Bach
Jay Baker ... Harvey 'Hal' Edison
Pat Barlow ... Clara
Lloyd Berry ... Ferryman
Deborah Foreman ... Muffy / Buffy St. John
Deborah Goodrich ... Nikki Beshears
Tom Heaton ... Constable Potter / Uncle Frank
Mike Nomad ... Buck
Ken Olandt ... Rob Ferris
Griffin O'Neal ... Skip St. John
Leah Pinsent ... Nan Youngblood (as Leah King Pinsent)
Clayton Rohner ... Chaz Vyshinski
Amy Steel ... Kit Graham
Thomas F. Wilson ... Arch Cummings